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// Copyright 2018 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution and at
// http://rust-lang.org/COPYRIGHT.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.
extern crate dlmalloc;
use alloc::{GlobalAlloc, Layout, System};
use super::waitqueue::SpinMutex;
// Using a SpinMutex because we never want to exit the enclave waiting for the
// allocator.
static DLMALLOC: SpinMutex<dlmalloc::Dlmalloc> = SpinMutex::new(dlmalloc::DLMALLOC_INIT);
#[stable(feature = "alloc_system_type", since = "1.28.0")]
unsafe impl GlobalAlloc for System {
#[inline]
unsafe fn alloc(&self, layout: Layout) -> *mut u8 {
DLMALLOC.lock().malloc(layout.size(), layout.align())
}
#[inline]
unsafe fn alloc_zeroed(&self, layout: Layout) -> *mut u8 {
DLMALLOC.lock().calloc(layout.size(), layout.align())
}
#[inline]
unsafe fn dealloc(&self, ptr: *mut u8, layout: Layout) {
DLMALLOC.lock().free(ptr, layout.size(), layout.align())
}
#[inline]
unsafe fn realloc(&self, ptr: *mut u8, layout: Layout, new_size: usize) -> *mut u8 {
DLMALLOC.lock().realloc(ptr, layout.size(), layout.align(), new_size)
}
}
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